Evoscan/Mitsulogger "Speed" fault

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Evoscan/Mitsulogger "Speed" fault

Postby CPhoenix » Sun Jan 21, 2007 6:31 am

Hiya guys,

Just wondering if someone could help me and point out where I'm going wrong. I've got myself an Openport cable for my 96 JDM Mitsubishi Mirage Cyborg so I can use Evoscan and Mitsulogger and it all seems to work perfectly with the execption of the speed reading. When I'm not moving it will register as 300??? and then when I'm driving its all over the shop....

I've tried swapping KPH/MPH but to no avail...

I've included a cross section of one of my runs with EvoScan as CSV:-

Code: Select all
LogEntryDate,LogEntryTime,LogEntrySeconds,CoolantTemp,RPM,TPS,Speed
06/01/2007,27:57.4,93.75,81.86106872,843.75,14.50980392,414
06/01/2007,27:57.7,94.03125,81.86106872,937.5,14.50980392,408
06/01/2007,27:58.0,94.32812,81.86106872,906.25,14.50980392,414
06/01/2007,27:58.3,94.60938,81.86106872,906.25,14.50980392,418
06/01/2007,27:58.6,94.90625,81.86106872,906.25,18.43137255,486
06/01/2007,27:58.9,95.21875,81.86106872,1343.75,19.60784314,492
06/01/2007,27:59.2,95.53125,81.86106872,1781.25,20.39215686,496
06/01/2007,27:59.5,95.84375,81.86106872,1781.25,21.96078431,508
06/01/2007,27:59.8,96.14062,81.86106872,1562.5,21.96078431,6
06/01/2007,28:00.1,96.45312,81.86106872,1500,24.70588235,8
06/01/2007,28:00.4,96.76562,81.86106872,1625,25.09803922,10
06/01/2007,28:00.7,97.07812,81.86106872,1718.75,26.2745098,12
06/01/2007,28:01.1,97.40625,81.86106872,1781.25,27.45098039,18
06/01/2007,28:01.4,97.71875,81.86106872,1906.25,30.19607843,64
06/01/2007,28:01.7,98.04688,81.86106872,2093.75,38.82352941,90
06/01/2007,28:02.0,98.375,81.86106872,2343.75,43.1372549,88
06/01/2007,28:02.4,98.71875,81.86106872,2593.75,37.25490196,74
06/01/2007,28:02.7,99.0625,81.86106872,2812.5,36.07843137,34
06/01/2007,28:03.1,99.40625,81.86106872,3031.25,14.50980392,444
06/01/2007,28:03.4,99.75,81.86106872,3031.25,14.50980392,464
06/01/2007,28:03.7,100.07812,81.86106872,2718.75,22.74509804,10
06/01/2007,28:04.1,100.40625,81.86106872,2656.25,22.74509804,6
06/01/2007,28:04.4,100.73438,81.86106872,2218.75,20.78431373,492
06/01/2007,28:04.7,101.0625,81.86106872,2312.5,17.25490196,466
06/01/2007,28:05.0,101.39062,81.86106872,2343.75,16.8627451,458
06/01/2007,28:05.4,101.70312,81.86106872,2343.75,16.8627451,458
06/01/2007,28:05.7,102.03125,81.86106872,2343.75,16.8627451,460
06/01/2007,28:06.0,102.34375,81.86106872,2312.5,17.25490196,464


Thanks for any help you can give.

CP.
CPhoenix
 
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Postby Evo4Mad » Sun Jan 21, 2007 3:13 pm

1996 sounds very early for your OBDII computer, I dont think your model outputs a speed value.

you can calculate speed if you know which gear you were in.
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Postby CPhoenix » Mon Jan 22, 2007 12:46 am

Thanks for your reply.

The car was actually manufactured in Nov 95 but the batch spanned 95 to 96 and was always classed as the 96 model (design wise).
From what I'm aware the diag is kinda like OBD 1.5 / JOBD / MUTII (or III????) as Mitsu made their own similiar codes but seems to work very well with your EvoScan tool!

One other thing to note is that I have a (non-mechanical) MPH/KMH converter on the sensor (to pass UK reqs when importing), but I doubt this is causing the result we are seeing such random figures.

Also, I know its alot to ask but is there any chance you could include an extra field to calcuate speed based on gear in a later release so that I can see the results in real time?

Much appreciated

CP.
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Postby myszkewicz » Tue Apr 10, 2007 5:22 pm

CPhoenix wrote:Also, I know its alot to ask but is there any chance you could include an extra field to calcuate speed based on gear in a later release so that I can see the results in real time?

Much appreciated

CP.


You should be able to config your speed reading to do just that. Tell it to use the input from RPM and put in the appropriate formula for your chosen gear.

First, save a copy of your data.xml file someplace safe.

Right-click on the original, and choose edit.
Find the line for the "Speed" display. In my file it's line 73.
Change the requestID to 21 instead of 2F, and for eval put in 1875x /gear_ratio /final_drive_ratio *3.1415*tire_diameter /63360

With the correct gear ratios and tire size (not to mention parentheses for operation grouping), that will turn the raw rpm signal into miles per hour for whichever gear's ratio you enter.

But it'll only work for that one gear.
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Postby Evo4Mad » Tue Apr 10, 2007 10:28 pm

I was thinking of adding that exact thing to EvoScan.. i.e have GearSpeed1, GearSpeed2, GearSpeed3, GearSpeed4, GearSpeed5
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Postby myszkewicz » Wed Apr 11, 2007 2:18 am

Would it be as easy as adding a few lines to the data.xml file? I haven't tried that yet.
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Postby Evo4Mad » Tue Apr 17, 2007 7:02 am

yes it would be as easy as that.
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Re: Evoscan/Mitsulogger "Speed" fault

Postby xor » Wed Apr 18, 2007 2:36 am

CPhoenix wrote:.. When I'm not moving it will register as 300???
CP.


It is similar on mine Galant 1995. I am sure ECU receives data from VSS (vehicle speed sensor), becuase it keeps higher idle when car is moving.

We can also check request 2E, which should be speed frequency according to BEZ disassembly:

http://www.aktivematrix.com/forum/viewt ... c&&start=0
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